import cv2
import base64
import FacePlusPlusAPI
import os, time
from multiprocessing import Process, Queue

# Get a reference to webcam #0 (the default one)
video_capture = cv2.VideoCapture(0)

# Initialize some variables
face_locations = []
face_encodings = []
face_names = []
process_this_frame = True
facePP_API_Key = 'Dh_1F9Ax2b5feD7KkAc0nu46v3CVnRRX'
facePP_API_Secret = 'VYKh8ciikCPCrbg4Lm2iuJrcxouqDNXP'
queue_frame = Queue()
queue_return = Queue()

def cv22base64(frame):
    # Convert captured image to JPG
    ret, buffer = cv2.imencode('.jpg', frame)

    # Convert to base64 encoding
    frame_as_text = base64.b64encode(buffer)

    return frame_as_text

def getFrame(q):
    while True:
        # Grab a single frame of video
        ret, frame = video_capture.read()
        q.put(frame)

        # Hit 'q' on the keyboard to quit!
        if cv2.waitKey(1) & 0xFF == ord('q'):
            break

def findFaceByWeb(qF, qR):
    while True:
        frame = qF.get(True)
        frame_as_text = cv22base64(frame)
        faces = FacePlusPlusAPI.faceppDetectAPI_base64(
            facePP_API_Key, facePP_API_Secret, frame_as_text
        )
        face_locations = [i["face_rectangle"] for i in faces]
        face_encodings = [i["face_token"] for i in faces]
        qR.put(face_locations)

def imshow(qF, qR):
    while True:
        frame = qF.get(True)
        if qR.empty():
            face_locations = []
        else:
            face_locations = qR.get(True)
        
        # Display the results
        #for face_location, name in zip(face_locations, face_names):
        for face_location in face_locations:
            top = face_location["top"]
            left = face_location["left"]
            bottom = top + face_location["height"]
            right = left + face_location["width"]
        
        # Draw a box around the face
        cv2.rectangle(frame, (left, top), (right, bottom), (0, 0, 255), 2)

        # Draw a label with a name below the face
        #cv2.rectangle(frame, (left, bottom - 35), (right, bottom), (0, 0, 255), cv2.FILLED)
        #font = cv2.FONT_HERSHEY_DUPLEX
        #cv2.putText(frame, name, (left + 6, bottom - 6), font, 1.0, (255, 255, 255), 1)

        # Display the resulting image
        cv2.imshow('Video', frame)

        if qR.empty():
            qR.put(face_locations)

if __name__ == '__main__':
    pGetFrame = Process(target = getFrame, args = (queue_frame, ))
    pFindFace = Process(target = findFaceByWeb, args = (queue_frame, queue_return))
    pImageShow = Process(target = imshow, args = (queue_frame, queue_return))
    
    pGetFrame.start()
    pFindFace.start()
    pImageShow.start()

    pGetFrame.join()
    pFindFace.terminate()
    pImageShow.terminate()

    # Release handle to the webcam
    video_capture.release()
    cv2.destroyAllWindows()